HONG KONG—A year after Covid-19 swept through China, the virus is under control. Now authorities have to motivate a population that feels little urgency to get vaccinated by using a mix of social pressure, incentives, education and coercion. While surveys show vaccine acceptance remains high, the motivation to go out and get inoculated is lagging in the world’s second-largest economy given low infection rates. China’s public health officials say the aim is to get 40% of the population vaccinated by summer. […] That is a long way from herd immunity—which would require about 80% coverage—and compares with about a third of the U.S. , according to the U.S. Centers for Disease Control and Prevention .
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